Brake Fluid Change
I was talking to a certified mechanic in our area about brake fluid change. He said that brake fluid does not necessarily need to be change/flush as we do with engine oil. The original fluid should last with the car. Even hitting past 100k miles, the original brake fluid will works as designed. He said that it is just a waste of time and money to change it. What do you think about it for a Porsche? Thanks
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The fluid should be flushed and changed at least every two years, more frequently if you track the car......... |
Wrong! Brake fluid is hygroscopic meaning over time it absorbs moisture. Under heavy braking the heat buildup can boil water in the brake lines into gas bubbles. As gasses can be further compressed in the line (unlike the brake fluid) the result is loss of effective stopping power when you need it most. In a high performance car that can ruin your day.
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Can you go 100K miles? yes. should you? probably not.
I know people that have gone 200K and 10+ years without changing the brake or transmission fluid. I think 2 years a bit excessive, most manufacturers seem to recommend 3 year intervals. Porsche brake components are no different than a honda's. My old '89 Toyota PU get's it every 10 years whether it needs it or not! No problems so far. Track driving would make it more critical. Let your conscience be your guide! Steve |
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What's so special? A caliper is a caliper, master, ABS controller, etc. They're sure to be more expensive than a "lesser" car, but many cars have brake systems and controls that are complex, with stability & traction control, etc.
Having said that, I'll flush mine every 2 years because it's still under warranty, and service records help with re-sale. I actually look for brake fluids with a high wet boiling point, more than by dry boiling point. With normal street use and change intervals, it's likely to spend more time "wet" than dry. |
copper contamination in brake lines
Here's an interesting article I found a while back that supports [frequent] brake fluid changes.
Regards, paul... |
My question is, "Why would you skip a brake fluid change?" Once you have the bleeder (which costs $55), every change will cost you about $15 and take about an hour, maybe less. It's easy, doesn't take much work or getting dirty, and is a good chance to take a look at the condition of your rotors and pads.
If you every track your vehicle, you MUST change your brake fluid. I had a friend tell me that I only needed to replace the fluid that was in the calipers. His theory was that the fluid didn't circulate through the system, so only the stuff near the actual calipers got hot. I didn't think it through and we changed just a bit of the fluid before my first track day. Of course, my brakes failed as a result. We quickly changed all of the fluid at the track, and the car was fine for the rest of the day. BTW, the fluid that failed had about 45k of normal, road miles on it. |
I did a complete brake and clutch slave flush per pedros instructions this past Saturday. It had last been done by the p-dealer I bought the car from on 2/07, almost three years. It looked brand new when I started flushing it out. I figured it probably didn't need it. When I was done... wow! what a difference in the brake pedal feel! It can still look ok and not be ok is basically what I learned. Flushing your brakes is a very easy diy. Especially if you have a bleeder machine. I'll have to say, the clutch slave was a bit of a nightmare to get to. I knew what I was getting into reading other posts. I'd rather spend a few $ on brake fluid and a Sat. afternoon doing it myself than say.... I don't know, $1k on brake work at a dealer after it's too late..... I would find a different mechanic.
sean |
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Considering how low-cost a system flush is, it also qualifies as cheap insurance…… |
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http://ecx.images-amazon.com/images/...500_AA280_.jpg |
Interesting article, it's a shame they stay very far away from mentioning any sort of timeline, such as typical levels in 5 year old fluid. The pictures are not very helpful either, except as extreme examples. There is no mention of the cars they came from, or their service history. They could have come out of a 20 year old car from the junk yard.
I'm well aware of the bad thing that can happen, fluid testing is wise, and replacement cheap insurance. But there is a bit of paranoia, if I don't flush my system every 2 years the brake system will explode and fall out of the car. |
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If you are not into doing the scheduled maintenance (routinely flushing the system is common practice in many OEM maintenance schedules these days), that’s fine, it is your car after all. But at least test the brake fluid once a year; you just might be surprised at what you find…………. |
Well, I will flush every 2 years on the Boxster, and plan on testing my "less valuable" vehicles ( aka. beaters ).
Sorry, it's Monday, and I guess I'm feeling a bit contrary! Come on Friday! |
I too, think you can get by on longer schedules...in fact, I have. I've gone 3 yrs. without a flush, but do I recommend it? No, because your brake pedal begins to feel squishy. If you're not going to use the car in a spirited fashion, I think it's fine for light use to just do it at a longer interval. To me, it is a pain in the arse to get it done because you have to jack the car up, get the wheels off, etc., etc.,... And you do have to make sure you don't spill it, because brake fluid is some nasty stuff.
Again, I don't recommend waiting longer than the 2 yrs min. recommendation, but I do know a lot of people don't ever get their brake fluid changed, and don't even know that this is a regularly scheduled item to replace. |
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that putting a little bit of coolant in the oil helps regulate heat in hot climates.
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[disclaimer: seriously people, don't do this!!!] |
Thank you for all the comments. I really don't like to follow the mechanic's suggestion about the break fluid. I have a feeling that there is something wrong of not changing the brake fluid since it will not cost you a lot of money. besides, changing it is easy to do for DIY. I will go to AutoZone and buy me a litter of brake fluid and wait for the perfect weather to work on it. Happy New Year to all !!!! :cheers:
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is brake fluid the same as clutch fluid
I took my car to a dealer because the engine light was on and i needed a smog check. my mechanic was unable to diagnosis the engine problem. dealer fixed that problem, but told me i had dirty clutch fluid. He'll replace for $250.00
Is that the same as brake fluid? Car is a 1997 with 75,000 miles. I did the 70,000 mile checkup at 53,000 in 2006 on the recommendation of my mechanic (although the mileage was low, the car was older and he felt it was necessary) Thank you for the help. |
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